PDF malware analysis — malicious · 0a2269422c6dcb60

MALICIOUS

PDF

80.6 KB Created: 2021-09-04 09:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04

MD5: 0170847e61ca3368816344c85d7f403d SHA-1: ed0055841d425ac1b6e4defcc57d0e50f003f81a SHA-256: 0a2269422c6dcb609b5277ed39b959e0264cdd2bf87c79ff195b03e7f32090be

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.8925

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://cuacuonnhanh.vn/Images_upload/files/64676283438.pdf In PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160795445aa3f7---nukugadamutebomut.pdfIn PDF document text
- http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/87578576630.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a607f8f78f---talobosata.pdfIn PDF document text
- https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/71607cbf39c19b960d2ef41b5a0f3ed3/21060294441.pdfIn PDF document text
- https://karlschool.org/uploads/files/202108172105196898.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d035650084a---11916071476.pdfIn PDF document text
- https://speakingparrot.com/upload/ckfinder/files/wololag.pdfIn PDF document text
- http://ordinate-ltd.com/file_media/file_image/file/suminibej.pdfIn PDF document text
- http://healthywithhart.com/res/file/71734178595.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160942c755c417---mezabiterek.pdfIn PDF document text
- https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/v3vei20qoka2rckqd7rcq0263n/13318188335.pdfIn PDF document text
- https://newtech-utm.pl/userfiles/file/zapesiwusov.pdfIn PDF document text
- https://amoslodge10-org.alljobsinliberia.com/ckfinder/userfiles/files/wobiv.pdfIn PDF document text
- http://pbsdeltarho50events.org/clients/d/dc/dc3fcb918f61c9276c5829b035df2abc/File/fegerudanefuxetepaji.pdfIn PDF document text
- http://mamnonlittlesun.com/upload/files/pipolawuwudixikax.pdfIn PDF document text
- http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/57068353384.pdfIn PDF document text
- https://digireg.ru/upload/86742901887.pdfIn PDF document text
- http://maszyny.pl/userfiles/file/40802468623.pdfIn PDF document text
- http://watch62.ru/files/files/91292303688.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/86509031919.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16072854948601---bemebopupuvar.pdfIn PDF document text
- https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/vueajevpfm5pg2pml6qou26tns/76871168236.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=preschool+books+pdf+downloadPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e4f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4F8	10848 bytes
SHA-256: `81778b69168023cf8ca7909a8a385c26352625d7e0677c241d7d4f662830c5aa`
`font_01_sfnt_off0000fdcf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDCF	17760 bytes
SHA-256: `00135d26495bdcc4bd3f8a831d7f84800389854b5036a9a7583e4ae7d0757d3b`
`font_02_sfnt_off00012bb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BB6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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